Data Zone
The site was identified as internationally important for bird conservation in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Populations meeting IBA criteria ('trigger species') at the site:| Species | Red List | Season (year/s of estimate) | Size | IBA criteria |
|---|---|---|---|---|
| Streaked Shearwater Calonectris leucomelas | NT | breeding (2003) | present | A4ii |
| Black-tailed Gull Larus crassirostris | LC | resident (2003) | present | A4i |
| A4iii Species group - seabirds | n/a | breeding (2003) | min 10,000 pairs | A4iii |
Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2015) is shown below.
| IBA conservation assessment | |||
|---|---|---|---|
| Year of assessment | State | Pressure | Response |
| 2015 | moderate | low | medium |
| Whole site assessed? | State assessed by | Accuracy of information | |
| yes | habitat | - | |
| State (condition of the trigger species' habitats) | |||
|---|---|---|---|
| Habitat | Quantity (% remaining) | Quality (% carrying capacity) | Result |
| Forest | good (>90%) | moderate (70–90%) | moderate |
| Pressure (threats to the trigger species and/or their habitats) | ||||
|---|---|---|---|---|
| Threat | Timing | Scope | Severity | Result |
| Energy production and mining | likely in long term (>4 years) | some of population/area (10–49%) | no or slight decline (<1% over 3 generations) | low |
| Geological events | past (and unlikely to return) and no longer limiting | some of population/area (10–49%) | no or slight decline (<1% over 3 generations) | low |
| Response (conservation actions taken for the trigger species and/or their habitats) | |||
|---|---|---|---|
| Designation | Planning | Action | Result |
| Whole area (>90%) covered by appropriate conservation designation | A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species | Some limited conservation initiatives are in place | medium |
| Year | Protected Area | Designation (management category) | % coverage of IBA |
|---|---|---|---|
| 1981 | Sanganjima | 国指定鳥獣保護区 (IV) | 100 |
| 1994 | Rikuchu - Kaigan | National Park (V) | 100 |
| 2013 | Sanriku Fukko (reconstruction) | 国立公園 (V) | 100 |
| Habitat | % of IBA | Habitat detail |
|---|---|---|
| Forest | - | |
| Marine Coastal/Supratidal | - |
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Sanganjima islet (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/sanganjima-islet-iba-japan on 27/12/2024.